Paper-gripping device



S. BECKER.

[PAPER GRIPPINGDEVICE. APPLICATION FILED SEPT-16. 1920.

1,378,648. Patented May 17,1921.

YNVENTOR SAMUEL EEcKEE ATTORNEYS UNIT-LED sTArETs -SAM-UELJBECKER, or BRoo L m-miw YORK; Y Y

T 0 all whom it may concern:

Be it known that I, SAMUEL BEoKER, a citizen of the United States, and a resident ofthe city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Pa er Gripping Device, of which the following is a full, clear, and exact description. r r

.This invention relates to an attachment for printing presses, and has particular refover substantially the entire area of paper which may be affected in the above mentioned manner.

A further object resides in the provision of the particular arrangement and construction of parts which will be hereinafter set forth and claimed and shown in the accom panying drawings.

Hitherto in the art of printing, whenever paper has been fed to the platens of machines and immediately thereafter gripped by the usual type of paper grippers, it sometimes happens that the paper, although alined with respect to the stops and guides on the platen, has been pushed too far on the platen whereby ripples or waves are formed therein, and when gripped by the ordinary grippers this wavy configuration is retained in the paper and, consequently, the printing is not properly disposed on the sheet. It is normally the intention to provide that paper, when fed into a machine, shall lie perfectly fiat. My invention resides in. an adjustable additional gripping device attached to the ordinary paper gripping arms of a printing press, which 'will engage the paper throughout'the greater portion. of its surface and tend to hold 11;

.fipecification.of Letters Patent.

Application filed September 16, 1920. Serial ms. 410,643.

Batented May 17, 1921.

fiat to eliminate the objectionable features above mentioned. 1 i l The invention is illustrated in the draw ings, of whichl Figure 1 is a plan-view ofthe platen with V the gripping, device attached thereto;

Fig. 2 is a partial sectional view of the gripper with a portion of "the cover plate removed; and

Fig. 3 is a sectional view taken on the l1ne 33 of Fig.2.

As shown in the drawings,,theyinvention 1s 1llustrated as embodied in a printing press, which comprises a platen 1 on to which a sheet of paper 2 is fed in any wellknownzman'ner. 'The paper is adaptedto be accurately registered with, "respect to stops or guides 3, 4' and5, "The platen is PIOVldBd with plates 6 and 7 at opposite rear edges thereof which act as bearings for stub shafts 8 on the rocker bar 8. The paper sheet 2 almost immediately after being fed on to the platen 1 is adapted to be gripped through certain portions of its area by paper grlpping arms 9 and 10. These arms are accurately positioned on the rocker bar 8 by means of bolts 11 and 12 and by means of'the engagement of their lower edges with a slot 12 in the rocker bar. On each of the arms 9 and 10 an adjustable additional paper gripping device is adapted to be positioned. This device comprises a plate of sheet metal 13 which is bent over in the form shown in Fig. 3 and adapted to em- 1 brace either one of the arms 9 and 10. The outer free ends of this plate 13 are optionally positioned with respect to each other by rivets or other suitable means 14 and 15. An integral portion of this plate 13 is extended in the form of a finger or arm 16 which extends outwardly in the direction shown in Fig. 1 to contact with the paper sheet 2 more closely, and the area upon which the printing is to be done, than to the arms 9 and 10.

On the rivet 1 1 a brake bar 17 is adapted to be pivoted, this brake bar engaging with one edge of the arms 9 and 10 when actuated. On the rivet 15 a cam member 18 is disposed and adapted to be actuated by a handle portion 2L This cam handle 21 is adapted to be locked in its actuated position by means of a lever 19 on the outer end of which is a projecting stud 20. The

arm 19 is resilient, whereby the stud 20 can be removed to one side to release the lever 21, but when in normal position lies back of the lever 21, as shown in Fig. 2, to hold it in its operative position.

In the operation of the device, after the paper has been fed on to the platen 1 and the paper gripping arms 9 and 10 move downwardly to grip the paper on the platen, the long projecting finger 16, made integral with the sheet of metal 13 and being slightly resilient, is disposed so as to engage the paper sheet 2 slightly in advance 0]": the engagement thereof with the arms 9 and 10. This not only provides that any ripples or waves in the paper will be smoothed out, but it also insures that the central portion of the paper, immediately adjacent the area to be printed, will be held fiat. Byreason of the cam and brake bar above mentioned, the gripping device can be slid along the arms 9 and 10 into any desired position.

What I claim is:

1. A paper gripping device comprising a platen adapted to receive paper, a plurality of paper gripping arms cooperating therewith, a plurality of slides on said arms an integral resilient finger on each slide adapted to contact with the paper, a brake shoe on the slide adapted to contact with the arm, and a cam to hold the brake shoe against the arm.

2. A paper gripping device comprising a platen adapted to receive paper, a plurality ofpaper gripping arms cooperating therewith, a plurality of slides on said arms, an integral resilient finger on each slide and adapted to contact with the paper, a brake shoe on each slide adapted to contact with the arm, a cam adapted tohold the brake shoe against the arm, and a latch to hold the cam in actuated position.

3. A paper gripping device comprising a platen adapted to receive paper, a plurality of paper gripping arms cooperating therewith, a plurality of slides on said arms, an integral resilient finger on each slide adapted to contact with the paper, a brake shoe pivoted on each slide and adapted to contact with the arm, a cam adapted to hold the brake shoe againstthe arm, a lever for operating said cam, a resilient plate on the slide, and a depending stud on the end of said plate, said stud adapted to lie back of the cam lever and hold it in its operative position. Y

SAMUEL BECKER. 

